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SUMMARY:Exploring the Spatial and Temporal Variability in Water Column Pro
 perties in Tidewater Glacier-Ocean Systems in the Canadian Arctic Archipel
 ago - Claire Parrott\, University of British Columbia
DTSTART:20250409T140000Z
DTEND:20250409T150000Z
UID:TALK228061@talks.cam.ac.uk
CONTACT:Dr Birgit Rogalla
DESCRIPTION:The Canadian Arctic Archipelago (CAA) is home to over 300 mari
 ne-terminating glaciers facing retreat with ongoing Arctic change\, increa
 sing glacial meltwater delivery to the ocean. Subglacial discharge can pro
 duce meltwater plumes that promote upwelling and enhance mixing near glaci
 er termini\, impacting water column structure\, turbidity\, and other biog
 eochemical properties in the proximate ocean. Despite their abundance\, kn
 owledge is lacking on glacier-ocean systems across the CAA\, specifically 
 how glacial meltwater is influencing and modifying the marine environment 
 in the coastal ocean. This talk explores the 4 years of late summer in-sit
 u observations of marine-terminating glacier-ocean systems and non-glacier
 ized systems in Jones Sound\, a glacier rich region of the CAA. Specifical
 ly\, we examine the systematic influence of marine-terminating glacier pre
 sence on the chemical and physical marine environment and contrast marine-
 terminating glacier systems with riverine systems in the same region. We f
 ind marine-terminating glaciers host late-summer nutrient enhancement abov
 e the region's characteristic nutricline year over year. This contrasts ri
 verine systems that show rare nutrient enhancement above the characteristi
 c nutricline. Ongoing retreat may shift these systems towards riverine-lik
 e systems\, reducing this above-nutricline nutrient enhancement that may i
 mpact phytoplankton community composition\, which may have subsequent impa
 cts on carbon sequestration and food web function. This work also informs 
 the Inuit community of Ausuittuq (Grise Fiord\, NU)\, who live in Jones So
 und and use the neighbouring ocean for traditional hunting\, culture\, and
  economic benefit\, about the ongoing change in their local environment.
LOCATION:BAS Seminar Room 2
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